.headers{
    width: 100%;
    height: 50px;
    background :#fff;
    min-width:650px;
    overflow: hidden;
}
.l{
    float: left;
    margin: 0;
}
.r{
    float: right;
    width:650px;
}
.tab{
    float: left;
    width: 100px;
    height: 50px;
    line-height: 50px;
    margin:0 15px;
}

.active{
    color:orange;
}

